/*程序员面试宝典*/Which of the following statements describe the results of executing the code snippet below in C++?

Which of the following statements describe the results of executing the code snippet below in C++?

1 int i;
2 
3 void main()
4 
5 {
6 
7     int i = i;
8 
9 }

 

    A. The i within main will have an undefined value.

    B. The compiler will allow this statement, but the linker will not be able to resolve the declaration of i.

    C. The i within main will have a value of 1.

    D. The compiler will not allow this statement.

    E. The result is compiler-dependent.

 

 作用域,存储类型,以及连接属性的相关问题

1.作用域:内部变量会屏蔽掉同名的外部变量,

2.第一个i的连接属性为static,存储于静态存储区,具有文件作用域;

 第二个i的连接属性为auto,存储于堆栈存储区,具有函数作用域,

3.连接属性为static,也就是存储类型为静态存储区的变量在声明时若未初始化,编译器会将其默认初始化为0;

 连接属性为auto,也就是存储类型为堆栈存储区的变量在声明时若未初始化,编译器不做任何动作,该变量状态为未定义。

 

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